Tire.



M. C. OVERMAN.

TIRE.

APPLICATION FILED Alli-3.5, 1912.

Patented Ap1a24, 1917.

3 SHEETS-SHEET 1.

INVENTOR M. C. OVERMAN.

TIRE. 4

APPLICATION men AUG.5. 1912.

1,223,727.. Patented Apr. 24,1917.

3 SHEETS-SHEET 2.

\NVENTOR WITNESSES:

/ T ATTORNEY.

M. c. OVERMAN.

TIRE. APPLICATION FILED AUG-5, I932.

WITNESSES: INVENTOR Q W Y 7 S I m ATTORNEY my own MAX CYRUS OVER'MAN, OFNEW YORK, N. Y.

TIBE.

Application filed August 5, 1912.

To all whom it may concern: Be it known that, 1. MA): (15' nusOlS-IRMAQ, a citizenof the United States, residing ut New York, in thecounty oi. New York and State of New York, have invented certain new.and useful Improvements in 'lircs, of which the following is aspecification.

My present invention relntrs to which: tires having deep clefts in theirnose poi tion, and serves to prevent said rleits from picking up stones.Further. mu; form of my present improvement servos at the some time tolie together the parts of tbe nos-o slparated by the (-lefts in make shil parts ilri ll to work together as a unit or Eliillibi' bro the tire isrunning, but u'iilmut ilsllmlililg the flexibility of the nose sought:to be ro duced therein by the clefls.

For the sake of illustration, the xirau ings show my improvementsapplied to tires 05 invention. in these drawings, which show only someoi the specific forms which my improvements are ail-opted to take,Figure 1 is a vertical section through a tire within my inventionprovided with my present improvements: Fig. 2 is a Plan view of afragment of said tire on-a larger scale; Fig. 3 is a perspective view ofa fragment of the same tire; Fig. 1- is u perspec tive View on a. stilllarger scale of one of the inserts or cores forming: part oi the mold bywhich the tire of the precmling figures is made; Fig. 5 is a plan Viewoi the some core. looking, upwardly at big. 4; Fig. l) is a view similarto Fig. 1 of a tire embodying an other form of'my present invention;Figs. '1 imd 8 are views similar to Figs. 2 and 3 of the tire of Fig. 6;and Figs. 9 and ill are views similar to Figs. 4 and 5 of a modifiedform of insert suitable for use in molding the tire of Figs. 6 to 8inclusive.

I will now describe the devices shown in the drawings. The tire which Ihave chosen to illustrate the application of ments is like that of mycopending application for United States Letters Patent Serial No.658,495, filed November 4, 1911. Accordingly, a very brief descriptionthereof will suffice. It is a cushion tire having a V shapedlongitudinal opening 1. Thick, substantially straight, loazbsupportingwalls 2 converge steeply at the sides of this opening toward the tread.A deep nose portion 3 extends acrossthe apex of said opening and acrossthe lower ends of said walls, and has a bottom which is the tread oi'the tire and Specification of Letters latent.

my improve-.

Patented Apr. 24, 1917.

Serial No. 713,295.

which delivers the vertical thrusts from the trend well under the sidewalls. The deep nose portion firmly upholds the side walls along withtheir load; and is given lateral and longitudinal flexibility,cooperating with that of the Walls first by a deep tread groove or cleft4 crossed at intervals by transverse webs 5 to prevent the two halves ofthe nose from being too flexible, much less flimsy, at the trend; andsecond, by the transverse clefts 5. These latter extend from. the treadand the sides of the tread puckits or cicfts 4, and thence upwardly wellunder the side walls of the tire, and also oie seen to extend throughthe sides of the nose, but do so only near the tread. since other hasthe tendency is to make the halves of the nose too flexible laterally.

7 is the wheel folly. having flanges 8 at the sides of the base portion9 of the tire.

1O is a transverse section of one of the clamping plates and bolts bywhich the longitudinally divided base portion of the tire over the topof the ii-shaped opening is clamped to the telly.

Coming now to my present improvements, I prevent the deep clefts or soclcets in the nose of my tire from picking up and retainlog stones byproviding projections within them which prevent the stones from lodgingin the bottoms of the clcfts.

in the tire of Figs. 1 to 3 inclusive, each pocket or rich; 4 under thelongitudinal opening has a high projection 14 attached to the bottom andto the side of the pocket which is opposite to the transverse cleft 6.Further, in the same tire each transverse cleft has a pair of highprojections 15 attached to the bottom and sides of the cleft and arepreferably in staggered overlapping relation to each other as best shownin the plan view of Fig. 2

Figs. 1 and 3 projections 14- and 15 prevent stones from lodging in thebottom of'any of the clefts.

In the tire of Figs. 1 to 4, each pocket or cleft under the longitudinalopening has a high projection 16 which is the' same as the.corresponding projection 14 in the other tire except that it is tied tothe end wallsof the cleft by Webs 16 extending lengthwise of the trend.In the same tire, each trans- Verse bleft 6 has a projection 17 attachedto the bottom and to the sides of the cleft across which it extends. V.

Figs. 6 to 8 bet show how these modified best show how the aforesaidForms of projections also keep stones out of the bottom of the clet'ts;and Fig. 7 shows in addition how they longitiulinally tie together theparts IS into \vhieh the elet'ts divide up the nose, so that said partsare eaused to art or are earried along as a unit or entirety when theyare in ground contact and the tire is runnin ()ne of the advantages isthat they serve to limit the wearing: otl' ot' the rear edges of theparts 18 \vhieh is the tendeney when they are too llesihly eonneeted inlongitudinal direction. 1

Although it is not es ential. I prefer to mold the herein des rihedprojeetious integrally with the tire at the same time that the tireitself is molded. For this purpose I suitably support around the treadot' the. mold as many eores as there are eomhined longitudinal andtransverse elel'ts land ti. llaeh of these eores has a shapeeorrespouding tothe reverse of a eomhined longitudinal and transverseelet't. 'l'hus. Fig. tshows in wrs wetive one of these eores for makingthe tire of Figs. 1 to 5. Barring the hat that this eore is drawn on amueh larger seale, it will heseen that its exterior corresponds with. ormight lit into. the interior of the eomhined elel'ts t and [3 of thetire of Figs. 1 to 5. The part it of the eore eorresponds with 'let't lof the tire: H3 of the eore with elel't t; of the tire: the grooves IL?with the projeetions l5: and the slot li t with the projeetion 11. Fig.5 is an underneath plan of the same eore.

Fie's. f and i are similar to Figs. 4 and .1 hut dill'er in showin aeore suitahle for uu|l ing the tire of l igs. ti to H. The partsthereol' eorrespoudiug with the parts of the tire are as follows: ll ofthe eore eorre- :\])0ll1l. ith elel't l of the tire: lti ol' the eorewith elel't 13: slot it? with projeetion 17:

groove 1143 with projection 16; and slits 116 with the web 16.

What I claim is:

1. ruhher vehiele tire having. a tread made llexihle by open cavities,and small proieetions in the 'avities, eaeh attached to the hotlmn and aside wall of the given eavitv.

2. ruhher vehiele tire having a tread made tlexihle hy open eavities.and small projeetions in the eavities. eaeh attached to the hottom and aside wall of the given eavitv. the projections on the opposite sidewalls of the same eavity being staggered so as not. to abut-against eaehother when the tire is in action.

ruhher vehiele tire having a tread made tiexihle by open cavities. andsmall projeetions in the eavities. each attached to the hottom and aside wall of the given cavity. the projeetions on the opposite sidewalls of the same eavity heing staggered So as not to abut against eaehother when the tire is in aetion. and the, projeetinns from the one sidewall extending across the given eavity substantially as far as theprojections from the opposite wall.

l. A ruhher vehicle tire. having a treadmade llexihle by openeavitiesand small projections in the rarities, each attached to only one sidewall of the given cavity. the projeetions on opposite side walls of thesame rarity extending to the middle portion thereof. hut heing staggeredso as not to abut against each other when the tire is in action. Intestimony whereof I allix my signature in presenee of two witnesses.

MAX CYRUS ()VERMAN. Witnesses ll. \V. Sena-am, J12, C. MeDoxxnLL.

